Improvement in machines for turning carriage-axles



- ZSheets-Sheel H, MGKENZIE T. COULTER.`

llrr

Aw .n

aDl

hf GM. a6

M., 7 l 0 N M'lwssesa" l 4M. MIU-LITHOGRAPHIE Call. {rama/15's Mauss)rier slide, C, and a slide-rest, l).

HECTOR MGKENZIE AND THOMAS COULTER, OF BPDGEPORT, CONN.

IMPROVEMENT IN MACHINES FR TURNING CARRiAGEHAXLES.

Specification forming part ofLetters Patent No. ll't'e', dated February17,1874 application tiled l November 1, 1873.

To all whom 'it may concern Beit known that we, Hnoron MoKnNzIE andTHOMAS COULTER, of Bridgeport, in the county of Fairiield and State ofConnecticut, have jointly' invented certain Improvements in Machines forMaking Carriage-Axles, of which the following is a specification:

The object of our invention is to facilitate the manufacture of wagonorearriage axles, and to make the same more uniform as regards their titof the box, and to a standard gage, so that there will be no difficultyin replacing a breken axle without the box. The invention consists invarious combinations, in the one machine, of certain mechanical de#vices and peculiarities in their construction, whereby the axle iscentered and its bearing portion turned to the required shape andtinished 5 also its collar and shoulder formed and serewthread cut onits end, and the axle genorally completed, read y for dressing orfinishing when hardened; all of which operations are performed by theone machine, and with out removing it therefrom, thus doing away withmuch handling, the usual iiling, and labor consequent on a succession ofoperations inthe ordinary method of manufacturing axles.

ln the accompanying drawings, which form part of this specification,Figure 1 represents a plan of a machine embracing my improve-Y ments,Fig. 2, a vert-ical longitudinal section of the same on the line .r .r,Fig. 3, a vertical transverse section on the line y y,- Fig. et, an endview, in part, of the tool-carrier, with tools attached; Fig. 5, atransverse sec-tion through a portion of the tool-holder, inillustration of the roughening-tools; and Fig. G, a longitudinal viewofthe axle or haltaxlc as it comes from the machine.

Similar letters of reference indicate corre spending parts.

A is the bed or shears of the machine, carrying a head-stock, B, alongitudinal toolfcar- Y The headstock B is fitted with a hollowrevolving mandrel, the forward end of which has a jawed chuck, nE, thatreceives within it, and serves to hold by its jaws, a thimble, F,provided with any number of set-screws, I), for clamping t-he shank ofthe axle Gr, which is entered within or through the thimble and mandrel.

where it is held by the jaws of the chuck E,

constituting a ball-joint, c, to facilitate the truing of the axle inthe machine, as hereinafter described. The longitudinal slide C hasmounted on it a tool head or carrier, H, fitted so as to be capable ofbeing turned about a vertical axis, as required, in order to presentdifferent tools, carried by it, to the work, for which purpose saidrotating tool-head is in the same general line with thc revolving chuck.The one of the tools or devices carried by the head H consists of ahollow radial socket, I, which, by moving up the slide C, is firstbrought in connection with the rough axle, reeei ving the bearing endofthe latter within it and holding the axle by its point firmly to itsplace and in true position as regards its axial center, so that it willbe an easymatter to true the axle at or by its shank by means of theball-joint c and adjustment of the jaws ofthe chuck E, to firmly clampthe thimble F, and the axle in the thimble, by the screws I). The slideC is then run back, and the tool-head il turned partly round, to bring arougheningtcol, J, into line with. the axle, and so that, on forcing upthe slide C again, said tool is brought into action on the bearingportion of the axle, to remove the surplus stock, to turn down the end dfor the screw-thread, and to pare oft' tothe required length such'reduced portion. To this end the rougheuing-toolJ is composed ofsix--more or less-cutters, the advance one, c, of which is set toroughen down the collarjcf the axle, the next one, el, to operate on theshoulder g; the next succeeding` ones, c2 c2, set to form an inelincdseries, to take surplus metal from the portion la, and to give theretoits requisite taper in the rough 5 the next one, ci, set to reduce theend (Z for the scrcwth-read; and the last cutter, et, adjusted to pareoff the extremity of the reduced portion d--all of such reductionstaking place by feeding up the slide C. This having been done, the slideC is again run back and the tool-head ll turned to bring a die, K, inline with the axle, to cut the screw thread on the portion d by runnin gup the slide C, and subsequently the tool-head H turned and slide Cadjusted to bring a finishing-tool,

L, into action on the axle by feeding up the This tool L is composed ofa continslidc C.

nous straight-edged cutter, fi, set at an angle, to correspond with therequired taper of the portion h of the axle, and a cutter, k, shaped toact upon the collar f and shoulder g of the axle. In the back end ofthis tool or toolholder L is xed a drill, l, for the purpose of drillingthe one end of the revolving axle simultaneously with the cutters i andk performing their work. In rear of the head-stock B is also arranged adrill, m, forced up by a handlever, n, for drilling` the center in theshank end of the axle. These centers facilitate the after dressing andfinishing of the axle when hardened. A polishin g-tool may also be addedto the rotating head II. if desired, for action on the axle after thefinishing-tool L. rBhe slide-.rest D carries a cutter-holder, 0, hingedat its outer end to the slide and having a cutter, p, which, as theslide is advanced, serves to trim the edge and back of the collar f. Thecutter-holder o is hinged, as described, to admit of its being thrown upor back, as represented in Fig. 3, so as not to interfere with theadvance feed of the rougheningtool J and 'finA isliing-tool L.

The axle or half-axle thus iinished is ready, as it is taken from themachine, for dressing or further finishing when hardened, and to be cutand welded at its shank end to its fellow.

The slide G may be worked backward and forward by means of rack andpinion, as shown in the drawing, or by any other suitable means.

The rotating tool-head H, too, may be arrested and locked, whenadjusted, by a spring or other stop, to hold the tool presented to theaxle in position.

Ve claim as our invention and ldesire to secure by Letters Patentl. Thecombination of the thimble F, having a spherical portion, c, with thejaw-chuck E and the centering-socket I, substantially as and for thepurpose herein set forth.

2. The roughening-tool J, with its cutters e eI e2 c3 e, in combinationwith the rotating tool head H and slide C, essentially as shown anddescribed.

3. The rotating tool-head H, provided with a centering-socket, I, aroughening-tool, J, a die, K, and a finishing-tool, L, all constructedand arranged essentially as described, in combination with the slide C,for the purposes specified.

4. The drill Zin the rear portion of the iinishing-tool L, incombination with the drill m, arranged in rear of the headstock B andmade capable of operation by hand in the axial di reetion of thehead-stock, substantially as and for the purpose herein set forth.

HECTOR MCKENZIE. THOMAS COULTER.

Witnesses:

RUDOLPH KORT, EDWARD H. LYON.

